Multiple microalloying scandium-containing hydronalium welding wire and preparation method thereof

A technology of micro-alloying and alloy welding wire, applied in welding equipment, metal processing equipment, welding medium, etc., to achieve the effect of excellent corrosion resistance, excellent resistance to marine atmospheric stress, and reduced tendency of hot cracking

Active Publication Date: 2009-03-11
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently available alternative welding wires (such as ER5356) are obviously not enough to provide good welding compatibility for Al

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A multi-element micro-alloyed scandium-containing aluminum-magnesium alloy welding wire, its chemical composition (wt%) is: magnesium (Mg) 4.5, manganese (Mn) 0.4, zinc (Zn) 0.5, zirconium (Zr) 0.05, scandium (Sc ) 0.12, erbium (Er) 0.10, yttrium (Yb) 0.10, aluminum (Al) balance.

[0028] preparation:

[0029] (1) Raw material preparation: aluminum (Al), magnesium (Mg) and zinc (Zn) are added in the form of pure metals, alloying elements manganese (Mn), scandium (Sc), zirconium (Zr), erbium (Er), yttrium (Yb ) are added in the form of Al-based master alloy;

[0030] (2) Alloy smelting: use a vacuum induction furnace to smelt the alloy under the condition of pre-evacuating the preheated charge and filling it with argon. 4Zr, Al-10Er and Al-10Yb) were all melted, and then heated up to 780°C, metal magnesium and zinc were wrapped with aluminum foil and finally pressed in; in order to fully melt the existing coarse intermetallic compound particles in the master alloy, imp...

Embodiment 2

[0034] A multi-element micro-alloyed scandium-containing aluminum-magnesium alloy welding wire, its chemical composition (wt%) is: magnesium (Mg) 5.0, manganese (Mn) 0.6, zinc (Zn) 0.8, zirconium (Zr) 0.17, scandium (Sc ) 0.35, erbium (Er) 0.20, yttrium (Yb) 0.10, aluminum (Al) balance.

[0035] preparation:

[0036] (1) Raw material preparation: aluminum (Al), magnesium (Mg) and zinc (Zn) are added in the form of pure metals, alloying elements manganese (Mn), scandium (Sc), zirconium (Zr), erbium (Er), yttrium (Yb ) are added in the form of Al-based master alloy;

[0037] (2) Alloy smelting: using resistance furnace smelting, in the covering agent (10% CaF 2 +67%MgCl+15%CaCl 2 or MgF 2 ) under the protection of melting and melt purification, after degassing and slag removal, casting into φ120mm alloy ingot;

[0038] (3) Processing and forming: the alloy ingot is cut and peeled, and after homogenization and annealing at 450°C, it is hot-extruded into thin-diameter (≤φ10) ...

Embodiment 3

[0041] A multi-element micro-alloyed scandium-containing aluminum-magnesium alloy welding wire, its chemical composition (wt%) is: magnesium (Mg) 5.5, manganese (Mn) 0.7, zinc (Zn) 1.0, zirconium (Zr) 0.20, scandium (Sc ) 0.4, erbium (Er) 0.2, yttrium (Yb) 0.2, aluminum (Al) balance.

[0042] (1) Raw material preparation: aluminum (Al), magnesium (Mg) and zinc (Zn) are added in the form of pure metals, alloying elements manganese (Mn), scandium (Sc), zirconium (Zr), erbium (Er), yttrium (Yb ) are added in the form of Al-based master alloy;

[0043] (2) Alloy smelting: using resistance furnace smelting, in the covering agent (10% CaF 2 +67%MgCl+15%CaCl 2 or MgF 2 ) under the protection of melting, composition adjustment and melt purification, and cast into alloy ingots after degassing and slag removal; metal magnesium is added at the end of smelting, that is, after all the metal materials are melted and raised to a certain temperature, aluminum foil for pure magnesium Press...

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Abstract

The invention relates to a multi-element microalloyed scandium-containing aluminum-magnesium alloy series welding stick and a preparation method thereof. The components and the weight percentage of the multi-element microalloyed scandium-containing aluminum-magnesium alloy series welding stick are as follows: 4.0 to 6.0 percent of magnesium, 0 to 1.0 percent of zinc, 0.4 to 1.0 percent of manganese, 0.05 to 0.2 percent of zirconium, 0.10 to 0.40 percent of scandium, 0.10 to 0.40 percent of erbium and/or yttrium and the rest is aluminum. The Al-Mg welding stick applied by the invention has the advantages that: (1) the tissues of the welding line are uniformly thinned into spherical grains and have higher thermal stability; (2) the thermal-cracking resistance is obviously enhanced; (3) the obdurability of a welding joint is excellent; (4) the welding joint has excellent resistance for the stress etching of ocean-atmosphere; (5) a welding technique window is enlarged.

Description

technical field [0001] The invention relates to a multi-element microalloyed scandium-containing aluminum magnesium (Al-Mg) used for fusion welding of aluminum-zinc-magnesium (Al-Zn-Mg) high-strength aluminum alloys and aluminum-magnesium (Al-Mg) aluminum alloys. ) is an alloy welding wire and a preparation method thereof. Background technique [0002] Al-Zn-Mg series aluminum alloy is a typical medium-high-strength heat-treatable strengthening alloy with good welding performance, plasticity and processing performance. It is the main lightweight structural material for construction, ground vehicles, aerospace and military facilities and equipment. It is increasing year by year. For example, most components of 25mm mountain antiaircraft guns are made of Al-Zn-Mg alloy (7A52 alloy), and the new bridge equipment mainly uses medium-strength weldable Al-Zn-Mg alloy (7005 alloy). ) welded. [0003] At present, in the field of aluminum alloy fusion welding, non-heat treatment str...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40C22C1/03C22C1/02
Inventor 杨福宝徐骏刘恩克石力开
Owner 有研金属复材技术有限公司
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